Support macOS Sierra (10.12) and later.
The default package does not include git-gui or gitk. The package that has -gui in the name includes these but since the macOS-provided Tk is deprecated the guide seems to be broken on some modern systems, especially Apple Silicon.
The packages and binaries are signed. The non-gui package is also notarized, but the gui package is currently not notarized due to an issue with the Wish program that runs Git Gui.